Presentacin de PowerPoint

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Gravitating Non-Luminous Galaxies and Lambda-CDM
Cosmology Barry F. Madore (Carnegie
Observatories) Erica Nelson and Kristen Petrillo
(Pomona College)
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• Philosophical underpinnings (Falsifiability)
• There is no success like failure
• Karl Popper (1963)
• Conjectures and
  Refutations
• and failures no success at
  all.
• Robert Zimmerman (1965)
• Love Minus Zero / No Limit

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Physics of the CepheidInstability
StripPeriod-Luminosity-Color(PLC) Relation
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Physics of the CepheidInstability
StripPeriod-Luminosity-Color(PLC) Relation
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Benson et al. (2003)
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THEORY

• N-Body simulations in a Lambda-CDM
• cosmology predict a diverging excess
• of low-mass galaxies (from a few,
• up to 100 times more) than are actually
  observed.

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Gravitating Non-Luminous (GNL) Galaxies

• The solution du jour is the early expulsion of
  baryonic matter either at re-ionization or by
  supernova activity
• In either case, the dark-matter galaxy excess
  remains.
• GNL galaxies simply cannot be seen
• because they are pure dark matter
• but they should still be
  observable.

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• There are 127 RING galaxies cataloged to date.
• They were all cataloged on the basis of
• the target-galaxy morphology
• (i.e. the ring structure) not whether
• they had a visible companion or not.
• But

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• But
• all known RING galaxies do have visible
  companions. And all companions measured to date
  are physical companions.
• There are no isolated RING galaxies

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One-Armed Spirals

• There are 57 One-Armed spirals in
• the Elmegreen and Elmegreen
• Arm-Class 4 Category

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KPG 349 NGC 4618 4625
NGC 4625

• B. F. Madore, A. Gil de Paz, S. Boissier
  (OCIW)
• R. C. Kennicutt (UofA), K. Sheth (SSC)
• D. Thilker, C. Hoopes, L. Bianchi (JHU)
• C. C. Popescu, R. Tuffs (MPIfK), D. C. Martin
  (CIT)
• and the rest of the GALEX team

NGC 4618 Arp 023
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• Every bona fide one-armed spiral has
• a clearly identified implicated companion.
• There are
• no isolated one-armed spirals.

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• There are 257 Arp galaxies that are
  morphologically peculiar because of
• major distortions of the main body of the
  galaxy.

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• Through their gravitational interactions
• with other (luminous) galaxies.

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• Through their gravitational interactions
• with other (luminous) galaxies.

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• Through their gravitational interactions
• with other (luminous) galaxies.

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• Through their gravitational interactions
• with other (luminous) galaxies.

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• Through their gravitational interactions
• with other (luminous) galaxies.

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• Through their gravitational interactions
• with other (luminous) galaxies.

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• Through their gravitational interactions
• with other (luminous) galaxies.

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• All bodily disfigured Arp galaxies have visibly
  interacting companions

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Isolated Galaxies

• There are 1,052 galaxies in Karachentsevs
• Catalog of Isolated Galaxies
• Each galaxy was visually inspected and
  classified.
• Only a handful (27 out of 1000 3)
• show any signs of interaction or disturbance

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• There are no violently disturbed,
• but totally isolated galaxies.

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• Isolated Galaxies ARE NOT Disturbed

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• Isolated Galaxies ARE NOT Disturbed
• Peculiar Galaxies ARE NOT Isolated

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• Isolated Galaxies ARE NOT Disturbed
• Peculiar Galaxies ARE NOT Isolated
• One-Armed Spirals ALL HAVE Companions

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• Isolated Galaxies ARE NOT Disturbed
• Peculiar Galaxies ARE NOT Isolated
• One-Armed Spirals ALL HAVE Companions
• Ring Galaxies ALL HAVE Colliders

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• Isolated Galaxies ARE NOT Disturbed
• Peculiar Galaxies ARE NOT Isolated
• One-Armed Spirals ALL HAVE Companions
• Ring Galaxies ALL HAVE Colliders
• This is no gravitational signature supporting the
  existence of dark-galaxy companions